US Bridges

SR-A1A over Boynton Inlet

Fair

Palm Beach County, Florida · 1.3 Miles North of SR-804 · Structure no. 930061

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
133 ft
1 main span
Daily traffic
6,700
2022 count
Owner
State
State Highway Agency

About this bridge

SR-A1A over Boynton Inlet is a steel stringer/multi-beam or girder carrying SR-A1A over Boynton Inlet in Palm Beach County, Florida. It was built in 1975, so it is 50 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,700 vehicles a day, roughly 8% of them trucks, projected to reach 11,624 by 2044. The structure is 133 ft (40.6 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR-A1A
CrossesBoynton Inlet
Location1.3 Miles North of SR-804
RouteState Highway 0A1A
CountyPalm Beach County
StateFlorida
Coordinates26.54552, -80.04332
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating45.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length133 ft (40.6 m)
Longest span133 ft (40.6 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2022)
Projected traffic11,624 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-A1A over Boynton Inlet built?

It was built in 1975, making it 50 years old in 2025.

What condition is SR-A1A over Boynton Inlet in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does SR-A1A over Boynton Inlet carry?

About 6,700 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SR-A1A over Boynton Inlet?

The structure is 133 ft (40.6 m) long with a longest span of 133 ft (40.6 m) and a deck 40 ft wide.

Who owns SR-A1A over Boynton Inlet?

It is owned by the State Highway Agency.